Dude first of all HOLY SHIT! Should put Suicide Scooter graphics on it.
Awesome build I love seeing build threads for motors onto scooters and bikes,People put so much damn detail and quality into them it makes me think imgaine the cars they build!
16" Scooters FTW I had one I put 20" mounatin bike suspension forks onto and mounted a rear disk brake I ended up riding it down some crazy hills and ripped the forks off the frame landing a big downhill rise and did a fully hecktic nutbag to head stem crunch then knocked myself unconsious,possibly the ball pain put me unconcious.All in all fuckin fun and practical and yours looks spastic at half throttle.
Good luck with it.
Jake